EP2650724A1 - Dispositif de réglage de lumière - Google Patents

Dispositif de réglage de lumière Download PDF

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Publication number
EP2650724A1
EP2650724A1 EP11846606.9A EP11846606A EP2650724A1 EP 2650724 A1 EP2650724 A1 EP 2650724A1 EP 11846606 A EP11846606 A EP 11846606A EP 2650724 A1 EP2650724 A1 EP 2650724A1
Authority
EP
European Patent Office
Prior art keywords
light adjusting
substrate
optical
adjusting unit
rotating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11846606.9A
Other languages
German (de)
English (en)
Other versions
EP2650724A4 (fr
Inventor
Tatsuhiko Okita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympus Corp filed Critical Olympus Corp
Publication of EP2650724A1 publication Critical patent/EP2650724A1/fr
Publication of EP2650724A4 publication Critical patent/EP2650724A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/06—Means for illuminating specimens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B11/00—Filters or other obturators specially adapted for photographic purposes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms

Definitions

  • the present invention relates to a light adjusting apparatus.
  • Fig. 8 is an exploded perspective view showing an overall structure of a conventional diaphragm apparatus.
  • a structure in which, an optical filter unit 15 and an equipment 20 thereof are installed integrally as an diaphragm apparatus 10 has been proposed, and an adjustment of an amount of light is made possible by switching of an optical filter 16 by driving diaphragm blades 12 and 13 which are covered by a blade cover 14.
  • Patent Document 1 Japanese Patent Application Laid-open Publication No. 2007-017594
  • the optical filter 16 is moved between the two diaphragm blades 12 and 13. Therefore, at the time of driving the optical filter 16, the optical filter 16 makes a contact with the upper and the lower diaphragm blades 12 and 13. Accordingly, an optical thin film formed on the optical filter 16 comes off, and when the optical filter 16 is driven continuously, there is a possibility that an optical performance is degraded with the continuous driving.
  • the present invention has been made in view of the abovementioned circumstances, and an object of the present invention is to provide a light adjusting apparatus in which, it is possible prevent damage to an optical thin film which has been formed on components such as an optical filter and a lens.
  • a light adjusting apparatus includes a first substrate in which, an optical aperture is formed, and a second substrate in which, an optical aperture is formed, at least one rotating-shaft member which is rotatably installed on the first substrate and the second substrate, at least one light adjusting unit which is joined to the rotating shaft member, and a drive unit which moves the light adjusting unit, and by moving the light adjusting unit by rotating the rotating-shaft member by the drive unit, the light adjusting unit is pivoted alternately to an opened position at which, the light adjusting unit is corresponding to the optical aperture, and a retracted position at which, the light adjusting unit is retracted from the optical aperture, and incident light which passes through the optical aperture is adjusted in the light adjusting apparatus, and the light adjusting unit includes an optical element, and has an isolating unit which isolates a surface opposite each other the first substrate and the second substrate of the optical element, and the first substrate and the second substrate.
  • the isolating unit is a frame member which holds the optical element from around, and has a protruding portion which protrudes in an optical axial direction.
  • the frame member has a notch portion, and the optical element is joined to the frame member at the notch portion.
  • a width of the notch portion is smaller than a diameter of the optical element, and the optical element is joined by an elastic force of the frame member.
  • the isolating unit includes at least two protruding portions which hold locally, and the optical element is held by the protruding portion.
  • the rotating-shaft member is formed by a circular cylindrical shaped magnet
  • a drive source of the rotating-shaft member is an electromagnetic drive source which includes a yoke and a winding coil, and the circular cylindrical shaped magnet is rotated by the electromagnetic drive source.
  • a light adjusting apparatus shows an effect that it is possible to prevent damage to an optical thin film which has been formed on components such as an optical filter and a lens.
  • FIG. 1 is an exploded perspective view of the light adjusting apparatus 900.
  • an optical axial direction 801 of the light adjusting apparatus 900 is shown by an alternate long and short dashed line.
  • the light adjusting apparatus 900 includes a substrate 101, a substrate 201, a light adjusting unit 300, a spacer 401, and an electromagnetic drive source 500 as a drive unit.
  • An optical aperture 102 and a rotating-shaft hole 103 are formed in the substrate 101, and an optical aperture 202 and a rotating-shaft hole 203 are formed in the substrate 201.
  • the light adjusting unit 300 includes a filter frame member 301 and an optical filter 302, and a rotating-shaft member 303 which has a magnetic property.
  • the spacer 401 is disposed between the substrate 101 and the substrate 201, and creates a space for the light adjusting unit 300 to move.
  • the electromagnetic drive source 500 is a drive source which makes the light adjusting unit 300 turn, and has a winding coil portion 501 provided on a yoke member 502.
  • Fig. 2 is a perspective view showing the light adjusting apparatus 900 according to the first embodiment, in an assembled state.
  • the rotating-shaft member 303 of the light adjusting unit 300 is supported by the rotating-shaft holes 103 and 203.
  • the light adjusting unit 300 is disposed between the substrate 101 and the substrate 201.
  • the electromagnetic drive source 500 is disposed on the substrate 101.
  • Front-end portions 502a and 502b of the yoke member 502 are disposed at positions opposite each other the rotating-shaft member 303 which has the magnetic property.
  • the light adjusting unit 300 moves by the rotating-shaft member 303 being rotated by the electromagnetic drive source 500.
  • Fig. 3 and Fig. 4 are plan views describing the operation of the light adjusting apparatus 900.
  • Fig. 5A and Fig. 5B are diagrams showing a structure of the light adjusting unit 300, where, Fig. 5A is an exploded perspective view of the light adjusting unit 300, and Fig. 5B is a perspective view showing an assembled state of the light adjusting unit 300.
  • Fig. 5B shows a state in which, the optical filter 302 is fitted into a protective portion 304 of the filter frame member 301.
  • the optical axial direction 801 when the optical filter 302 is disposed on the optical aperture 202, is shown by an alternate long and short dashed line.
  • the light adjusting unit 300 includes the filter frame member 301 joined to the rotating-shaft member 303 and the optical filter 302.
  • the protective portion 304 is formed integrally with the filter frame member 301.
  • the optical filter 302 is fitted into the protective member 304 of the filter frame member 301, and the optical filter 302 is held by the protective portion 304.
  • a height in the optical axial direction of the protective member 304 being more than a height of the optical filter 302
  • a surface opposite each other the substrate 101 and the substrate 201 in the optical filter 302 is isolated from the substrate 101 and the substrate 201.
  • a method of joining the optical filter 302 and the filter frame member 301 is not specified in particular, and the optical filter 302 and the filter frame member 301 may be joined by using an adhesive etc.
  • the protective portion 304 holds around the optical filter 302, and also the protective portion 304 is protruded in the optical axial direction more than the optical filter 302. Accordingly, at the time of rotational movement of the light adjusting unit 300, since the protective portion 304 abuts with the spacer 401, the optical filter 302 does not abut with the spacer 401 directly. Moreover, when the light adjusting unit 300 undergoes rotational motion between the substrate 101 and the substrate 201, since the protective portion 304 makes a contact with the substrates 101 and 201, the optical filter 302 does not make a contact with the substrates 101 and 201. Therefore, there is no breaking or chipping of the optical filter 302 due to an impact at the time of abutting. Furthermore, there is no degradation of an optical thin film which is formed on the optical filter 302.
  • FIG. 6A and Fig. 6B are diagrams showing a structure of the light adjusting unit 320, where, Fig. 6A is an exploded perspective view and Fig. 6B is a perspective view showing an assembled state.
  • Fig. 6A is an exploded perspective view
  • Fig. 6B is a perspective view showing an assembled state.
  • FIG. 6B shows a state in which, the optical filter 302 is joined to the filter frame member 601.
  • the optical axial direction 801 when the optical filter 302 is disposed on the optical aperture 202, is shown by an alternate long and short dashed line.
  • the light adjusting unit 320 includes the rotating-shaft member 303, the optical filter 302, and the filter frame member 601.
  • a height in an optical direction of the filter frame member 601 becomes more than the height of the optical filter 302, and accordingly, the surface opposite each other the substrate 101 and the substrate 201 in the optical filter 302 is isolated from the substrate 101 and the substrate 201.
  • notch portions 601a and 601b are formed in a front end of the filter frame member 601.
  • the optical filter 302 is joined to the filter frame member 601 by being engaged with the notch portions 601a and 601b, and held.
  • the optical filter 302 is fixed by an elastic force of the filter frame member 601 by forming a diameter of each of the notch portions 601a and 601b to be smaller than a diameter of the optical filter 302. At this time, it is desirable that a material of the filter frame member 601 is a metal having a superior elasticity.
  • a method such as using an adhesive may be used as another method of joining.
  • the filter frame member 601 holds a part of a circumference of the optical filter 302, and also, the filter frame member 601 is protruded along the optical axial direction 801 more than the optical filter 302. Accordingly, at the time of rotating the light adjusting unit 320 to move, since the filter frame member 601 abuts with the spacer 401, the optical filter 302 does not abut with the spacer 401 directly. Moreover, when the light adjusting unit 320 undergoes rotational motion between the substrate 101 and the substrate 201, since the filter frame member 601 makes a contact with the substrates 101 and 201, the optical filter 302 does not make a contact with the substrates 101 and 201.
  • the elastic force of the filter frame member 601 is used as a method of joining the optical filter 302 and the filter frame member 601. Therefore, as joining is possible only engagement of the optical filter 302 with the notch portions of the filter frame member 601, it is not necessary to use an adhesive etc., and assembling becomes easier.
  • FIG. 7A and Fig. 7B are diagrams showing a structure of the light adjusting unit 330, where, Fig. 7A is an exploded perspective view and Fig. 7B is a perspective view showing an assembled state.
  • Fig. 7A is an exploded perspective view
  • Fig. 7B is a perspective view showing an assembled state.
  • FIG. 7B shows a state in which, the optical filter 302 is joined to the filter frame member 701.
  • the optical axial direction 801 when the optical filter 302 is disposed on the optical aperture 202, is shown by an alternate long and short dashed line.
  • the light adjusting unit 330 includes the rotating-shaft member 303, the optical filter 302, and the filter frame member 701.
  • Three protruding portions 701a are formed at an equiangular distance on the filter frame member 701.
  • the protruding portions 701a hold the optical filter 302 by holding locally the circumferential edge of the optical filter 302.
  • a height in an optical axial direction of the protruding portion 701a becomes more than the height of the optical filter 302, and accordingly, the surface opposite each other the substrate 101 and the substrate 201 in the optical filter 302 is isolated from the substrate 101 and the substrate 201.
  • a method of joining the optical filter 302 and the filter frame member 701 is bending the three protruding portions 701a in the optical axial direction after disposing the optical filter 302 on the filter frame member 701. Thereafter, the optical filter 302 is held by the protruding portions 701a.
  • the number of protruding portions may be two or not less than four, provided that the optical filter 302 can be held.
  • an adhesive may be used as another method of fixing.
  • the protruding portions 701a hold the circumferential locations of the optical filter 302, and also are protruded in an optical axial direction more than the optical filter 302. Accordingly, at the time of rotating the light adjusting unit 330 to move, since the protruding portions 701a abut with the spacer 401, the optical filter 302 does not abut with the spacer 401 directly. Moreover, when the light adjusting unit 330 undergoes rotational motion between the substrates 101 and the substrate 201, since the protruding portions 701a make contact with the substrates 101 and 201, the optical filter 302 does not make a contact with the substrates 101 and 201.
  • the optical filter 302 is fixed by holding by the protruding portions 701a. Therefore, it is not necessary to use an adhesive etc., and assembling becomes easier.
  • the light adjusting apparatus according to the present invention is useful as a light adjusting apparatus in which, damage to the optical thin film which is formed on a component such as an optical filter and a lens is prevented, and the light adjusting unit is driven stably.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Diaphragms For Cameras (AREA)
  • Blocking Light For Cameras (AREA)
EP11846606.9A 2010-12-06 2011-12-05 Dispositif de réglage de lumière Withdrawn EP2650724A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010271322A JP2012123037A (ja) 2010-12-06 2010-12-06 光調節装置
PCT/JP2011/078090 WO2012077642A1 (fr) 2010-12-06 2011-12-05 Dispositif de réglage de lumière

Publications (2)

Publication Number Publication Date
EP2650724A1 true EP2650724A1 (fr) 2013-10-16
EP2650724A4 EP2650724A4 (fr) 2014-05-07

Family

ID=46207130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11846606.9A Withdrawn EP2650724A4 (fr) 2010-12-06 2011-12-05 Dispositif de réglage de lumière

Country Status (5)

Country Link
US (1) US20130258434A1 (fr)
EP (1) EP2650724A4 (fr)
JP (1) JP2012123037A (fr)
CN (1) CN103221884A (fr)
WO (1) WO2012077642A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114431825A (zh) * 2022-04-12 2022-05-06 万灵帮桥医疗器械(广州)有限责任公司 裂隙灯显微镜、及其滤光调节结构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6071249B2 (ja) * 2012-05-24 2017-02-01 オリンパス株式会社 光調節装置
WO2014054743A1 (fr) * 2012-10-04 2014-04-10 オリンパスメディカルシステムズ株式会社 Unité d'imagerie
WO2016170568A1 (fr) * 2015-04-20 2016-10-27 オリンパス株式会社 Dispositif de réglage de lumière et appareil de traitement de diagnostic

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03260608A (ja) * 1990-03-12 1991-11-20 Fuji Photo Film Co Ltd 偏光フイルタの自動着脱装置
US5396487A (en) * 1989-09-19 1995-03-07 Asahi Kogaku Kogyo Kabushiki Kaisha Structure for holding an optical article
JP2002287203A (ja) * 2001-03-28 2002-10-03 Canon Electronics Inc 光量調節装置および光学機器
JP2006337658A (ja) * 2005-06-01 2006-12-14 Canon Inc カメラの露出装置
US20080175585A1 (en) * 2007-01-18 2008-07-24 Sony Corporation Light amount adjustment apparatus and image pickup apparatus
US20100253992A1 (en) * 2009-04-01 2010-10-07 Olympus Corporation Light adjusting device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0745051Y2 (ja) * 1983-09-02 1995-10-11 オリンパス光学工業株式会社 フィルター保持枠
JPH11133478A (ja) * 1997-10-31 1999-05-21 Canon Inc フィルター枠及び光学系内装部品
JP5323305B2 (ja) * 2003-10-14 2013-10-23 日本電産コパル株式会社 カメラ付き携帯用情報端末装置
JP4625729B2 (ja) 2005-07-06 2011-02-02 日本精密測器株式会社 絞り装置
JP5590783B2 (ja) * 2008-09-30 2014-09-17 日本電産コパル株式会社 露光量制御装置及びカメラ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5396487A (en) * 1989-09-19 1995-03-07 Asahi Kogaku Kogyo Kabushiki Kaisha Structure for holding an optical article
JPH03260608A (ja) * 1990-03-12 1991-11-20 Fuji Photo Film Co Ltd 偏光フイルタの自動着脱装置
JP2002287203A (ja) * 2001-03-28 2002-10-03 Canon Electronics Inc 光量調節装置および光学機器
JP2006337658A (ja) * 2005-06-01 2006-12-14 Canon Inc カメラの露出装置
US20080175585A1 (en) * 2007-01-18 2008-07-24 Sony Corporation Light amount adjustment apparatus and image pickup apparatus
US20100253992A1 (en) * 2009-04-01 2010-10-07 Olympus Corporation Light adjusting device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2012077642A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114431825A (zh) * 2022-04-12 2022-05-06 万灵帮桥医疗器械(广州)有限责任公司 裂隙灯显微镜、及其滤光调节结构
CN114431825B (zh) * 2022-04-12 2022-06-21 万灵帮桥医疗器械(广州)有限责任公司 裂隙灯显微镜、及其滤光调节结构

Also Published As

Publication number Publication date
US20130258434A1 (en) 2013-10-03
CN103221884A (zh) 2013-07-24
WO2012077642A1 (fr) 2012-06-14
JP2012123037A (ja) 2012-06-28
EP2650724A4 (fr) 2014-05-07

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